102631885 has 4 divisors (see below), whose sum is σ = 123158268. Its totient is φ = 82105504.

The previous prime is 102631871. The next prime is 102631889. The reversal of 102631885 is 588136201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51523684 + 51108201 = 7178^2 + 7149^2 .

It is a cyclic number.

It is not a de Polignac number, because 102631885 - 2⁵ = 102631853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102631885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102631889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10263184 + ... + 10263193.

It is an arithmetic number, because the mean of its divisors is an integer number (30789567).

Almost surely, 2^102631885 is an apocalyptic number.

It is an amenable number.

102631885 is a deficient number, since it is larger than the sum of its proper divisors (20526383).

102631885 is an equidigital number, since it uses as much as digits as its factorization.

102631885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20526382.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 102631885 is about 10130.7396077483. The cubic root of 102631885 is about 468.1957155576.

The spelling of 102631885 in words is "one hundred two million, six hundred thirty-one thousand, eight hundred eighty-five".